England may have thrashed Ireland but they left Twickenham sweating with star prop Mako Vunipola hobbling off.

The 28-year-old replaced Joe Marler after an hour but only lasted 17 minutes before having to withdraw with a sore hamstring.

It’s worrying for England as Vunipola has struggled with his hamstring all summer, especially with just 28 days left until they face Tonga in their World Cup opener. However, Eddie Jones played down the concern. ‘He got a bit of a twinge,’ said the England head coach.

England may have thrashed Ireland but left Twickenham sweating as Mako Vunipola limped off

‘It was more of a precaution to take him off. It will be investigated fully.’

Jones refused to shower his team with praise after the record thrashing, preferring to keep his compliments low-key after the match.

‘We got great set-piece ball today,’ he said.

‘George Kruis and Maro Itoje are the guys responsible for the backs doing their flash things because unless you get good quality ball like that on a platter it’s impossible for those guys to perform.

‘We adapted to the game on the run a little bit. The concentration levels of our players was good. It was a nice way to prepare for the World Cup.’

Ireland coach Joe Schmid said: ‘We were under-done and heavy-legged. We have to get better than that.’

South AFrica winger Aphiwe Dyantyi on Saturday admitted he has failed a drugs test, but claims he is innocent. The 24-year-old has not played for the Springboks in their recent warm-up Tests.

The 28-year-old replaced Joe Marler after an hour but only lasted 17 minutes